Portable concrete-mixer.



C. W. OVERTURF.

PORTABLE CONCRETE MIXER.

APPLIOATION FILED DEo.15,19oa.

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C. W. OVERTURP.

PQRTABLE UONGBETE MIXER.

APPLIoATIoN FILED DBo.15,19o8.

Patented Oct. 19,1909.

2 SHEETS-SHEET 2.

WITNESSES ATTORNEYS CHARLEY WALLACE OVERTURF, OF DUMONT, IOWA.

PORTABLE CONCRETE-MIXER.

Specification of Letters Patent.

Application led December 15, 1908.

Patented Oct. 19, 1909.

Serial No. 467,675.

T o all whom it may concern:

Be it known that I, @HARLEY WALLACE OVERTURF, a citizen of the United States, and a resident of Dumont, in the county of Butler and State of Iowa, have made certain new and useful Improvements in Portable Concrete-Mixers, of which the following is a specification.

My invention relates to improvements in devices for mixing together the materials for the preparation of concrete and it consists in the constructions, combinations and arrangements herein described and claimed.

An object of my invention is to provide a device in which the mixture of the masonry ingredients may be made rapidly and thoroughly and with the result that the product is homogeneous throughout.

A further object of my invention is to provide a device in which the time during which the materials are subjected to the mixing process may be varied at the will of the operator. I accomplish this by means of a mixing cylinder through which the materials pass and which can be inclined to a greater or less degree, thereby increasing or decreasing the rate of travel of the charge therethrough.

Other objects and advantages will appear in the 'following specification and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, in which- Figure 1 is a perspective view showing one embodiment of the invention. Fig. 2 is an end view partly in section of the cylinder and its suspending means. Fig. 3 is a section along the line 3-3 of Fig. 2, and Fig. 4 is a detail view in perspective of one of the mixing plates.

In carrying out my invention I provide a main frame consisting of the uprights 1, 2 and 3 and the top and bottom pieces 4 and 5 respectively. To the rear part of the bottom pieces 5 the wheels 6 are secured. A center sill or beam 7 projects forwardly and rests on the front trucks 8. The rear end of the frame is inclosed by sides 9, a galvanized iron roof l0, and a lloor 11, the door 12 being provided for access to the engine house thus formed. y

The engine 13 for driving the mixer may be one of many types. This is securely bolted to the floor 11. Within the engine ,side members 4 of the frame.

room are other adj uncts, such as the gasolene tank 14. The upright lever 15 controls a clutch for connecting the engine with concrete mixing device proper.

The mixing device consists of a cylinder or drum 16 open at one end and having an inwardly projecting annular flange 17 at the other. On the interior is a series of rows of mixing plates 1`8 -for causing the agitation and mixture of the charge as the drum is revolved. The manner in which these plates are made is clearly shown in Fig. 4. They consist of two integral L- shaped sections having oppositely directed bearing parts 18a and 18b and laterally projecting blades or paddles 18c and 18d. These blades are arranged at an angle to each other as shown in Figs 2 and 4, and are placed at an angle to the central axis of the cylinder. Preferably three rows of these plates are secured to the inner sides of the cylinder at equal distancesapart, the plates of adjacent rows being in staggered relation.

The drum is rotated by means of the sprocket chains 19 and 20, which also comprise the suspending means. The sprocket chains pass around the sprockets 21 and 22 on the shaft 23, which is journaled in the Around the drum are the channel irons 25 and 26, which form runways for the chains 19 and 20, respectively. On the ends of the shaft 23 are secured arms 27 and 28 respectively provided with flexible strips 29, having blocks of wood, iron or other suitable material 29X at their extremities, so that as the shaft is turned and the arms revolve, the blocks will be brought into engagement with the sides of the cylinder to knock loose any material which may adhere to the sides.

30 is the drive pulley over which runs the belt 31, which is connected to a wheel on the engine shaft. Supported above the drum is a water tank 32. A pipe 33 leads from this tank and projects into the delivery end of the cylinder. A` funnel 34 above the tank 32 is provided with a strainer 35 to keep out leaves and dirt.

From the foregoing description of the various parts of the device the operation thereof may be readily understood. The sand, cement, etc., are thrown into one end of the revolving drum and are carried around to the upper side. As said ingredient-s fall upon the opposite plates they are pushed forward by the inclined surface 18C and agairril up by the partl, This operation is repeated until the charge reaches the open end. The charge meets the stream of/water from the pipe 33 and is miXed into a workable mass before it is dumped out. The rate of travel of the charge can be Varied by raising or lowering one end of the cylinder through the shortening` or lengthen ing of one of the sprocket chains.

I claiml. In a portable concrete mixer, a frame, a shaft journaled in said frame, an engine for turning said shaft, sprocket wheels on said shaft, endless sprocket cliains'carried thereby, a cylinder suspended in said sprocket chains, runways on the outer surface of said cylinder for guiding said chains, and an arm carried by said shaft, said arm being adjustable to Various angular positions with respect to the shaft and longitudinally of the shaft and arranged to engage the cylinder at each revolution of the shaft to loosen the material adhering to the inner surface of the cylinder.

9,. In a portable concrete mixer, a frame, a shaft journaled in said frame, an engine for turning said shaft, sprocket wheels on said shaft, endless sprocket chains carried thereby, a cylinder suspended in said sprocket chains, runways on the outer surface of said cylinder for guiding said chains, and an arm adjustable longitudinally of the shaft'secured to each end 0f said shaft, each of said arms being provided with a' resilient end havinga weight secured thereto arranged to engage the cylinder at each revolution of the shaft to loosen any material adhering to the inner surface of the cylinder.

CHARLEY WALLACE OVER'IURF. 

